Microbially mediated iron ore formation, Silicic Superunit, Rudabánya, Hungary

• DOI: 10.1016/j.oregeorev.2015.08.005
• Publication Date: 2015-08-10T21:19:49Z
• Authors: Sarolta Bodor; Márta Polgári; Ildikó Szentpétery; János Földessy
• Keywords: Silicic; Marl

The mineralogical, petrological, geochemical and textural characterization of the Triassic Bódvaszilas Sandstone in Rudabánya open pit Aggtelek Mts. is summarized based on our investigations. pore-filling carbonate cement Lower Formation a proximal basin series (Rudabánya) was formed as result syngenetic early diagenetic two step microbially mediated Fe mineralization (Fe-oxide formation by chemo-lithoautotrophic Fe-oxidizing microbes (FeOB) suboxic neutrophylic environment, Fe-carbonate heterotrophic to anaerobic environment mineralized produced evidences). higher parts (transition between overlying formation, Szin Marl) same metasomatic processes that siderite ore Middle limestones dolomites. These led partial or complete replacement layers. Microbially enrichment also occurred at distal position (Aggtelek Mts.). later underwent deep burial diagenesis.